How do I convert 2D text into a mesh when alt c doesn't work in 2.8
Either right click on the text object, and select Convert to Mesh or from the Object menu select Convert to followed by Mesh from Curve/Meta/Surf/Text. If you've set selection to right click in preferences, the context menu obviously will not show up when you right click, and in that case you'll be limited to using the Object menu, or, as suggested in a comment, searching for it. After clicking your way through the steps, a window that lets you tweak the conversion will appear in the lower left (if it's closed, click the arrow to open it).



If you right click instead of left click on the menu item, a submenu will appear. From there you can click Assign Shortcut to set your own keyboard or mouse shortcut to call this.



In the same submenu, there's also Add to Quick Favorites. The Quick Favorites is a user defined menu, that can be called with Q. Blender 2.8 Quick Favorites -- A Feature Everyone Will Love? has a good description of how this feature works. This video is about six months old, and the UI still looks more like 2.79 than it does in newer builds, but this feature still works the same as in the video.